Glass formation and properties of chalcogenide systems XXVI: Permittivity and the structure of glasses AsxSe1−x and GexSe1−x

Feltz, A.; Aust, H.; Blayer, A

doi:10.1016/0022-3093(83)90667-1

Cited by 158 publications

(104 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, the composition variation of density indicates that there is considerable volume contraction in the region from Ge 33 to 45% [5,15]. The same tendency is also observed in Ge-Se system [16]. We suggest that the large volume contraction in the region is caused by such an increase of the interaction between the Ge-S(Se) chains.…”

Section: A Structural Modelsupporting

confidence: 71%

Structural development in Ge-rich Ge–S glasses

Sakaguchi

Ténné

Mitkova

2009

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

This is an author-produced, peer-reviewed version of this article. AbstractThe Raman spectra of Ge-S glasses in the Ge-rich region from Ge 33 to 46 % have been investigated in order to know the structural development of the network glasses. From the detailed curve fits, we have found that there is an unassigned peak at 410 cm -1 and it becomes larger with increasing Ge composition. To clarify the structural origin of the peak, we virtually constructed the atomic arrangement of the glassy state starting from the crystalline state through the liquid state and changed the composition gradually depleting the medium in sulfur. From the consideration of the structural modeling and the atomic orbital theory, we suggest that single Ge-S chain is a probable structural origin of the peak.

show abstract

Section: A Structural Modelsupporting

confidence: 71%

Structural development in Ge-rich Ge–S glasses

Sakaguchi

Ténné

Mitkova

2009

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

show abstract

“…The comparison shows that systematically smaller densities were obtained in the work by Bhosle et al (2012b). In the latter, agreement is claimed with the molar volume V m values given by Mahadevan et al (1995), but the latter were incorrectly copied from the work of Feltz et al (1983). As shown in Figure 3, the molar volumes measured by Feltz et al (1983) FIGURE 1 | The dependence of the liquidus temperature T L for the GexSe 1−x system on the composition x and mean coordination numbern = 2(1 + x).…”

Section: Glass Synthesis and Characterizationsupporting

confidence: 54%

“…In the latter, agreement is claimed with the molar volume V m values given by Mahadevan et al (1995), but the latter were incorrectly copied from the work of Feltz et al (1983). As shown in Figure 3, the molar volumes measured by Feltz et al (1983) FIGURE 1 | The dependence of the liquidus temperature T L for the GexSe 1−x system on the composition x and mean coordination numbern = 2(1 + x). The data point for Se is a mean of the values reported by Berkes and Myers (1971), Johnson et al (1986), Morgant and Legendre (1986), Ota and Kunugi (1973), and Stølen et al (1999).…”

Section: Glass Synthesis and Characterizationsupporting

confidence: 53%

“…FIGURE 2 | The dependence of the mass density at room temperature ρmass for the GexSe 1− x system on the composition x and mean coordination number n = 2(1 + x). The results from the present work at ≃22°C are compared to those taken from Andonov (1982), Avetikyan and Baidakov (1972), Azoulay et al (1975), Bhosle et al (2012b), Borisova (1981), Feltz et al (1983), Feltz and Lippmann (1973), Guin et al (2002b), Hafiz et al (1993), Ito et al (1988), Loehman et al (1972), Ota et al (1978), Senapati and Varshneya (1995), Sreeram et al (1991b), and Yang et al (2013). The solid (black) curves are drawn as guides for the eye.…”

Section: Glass Synthesis and Characterizationmentioning

confidence: 77%

See 1 more Smart Citation

Topological Ordering and Viscosity in the Glass-Forming Ge–Se System: The Search for a Structural or Dynamical Signature of the Intermediate Phase

et al. 2017

View full text Add to dashboard Cite

The topological ordering of the network structure in vitreous Ge x Se 1−x was investigated across most of the glass-forming region (0 ≤ x ≤ 0.4) by using high-resolution neutron diffraction to measure the Bhatia-Thornton number-number partial structure factor. This approach gives access to the composition dependence of the mean coordination number n and correlation lengths associated with the network ordering. The thermal properties of the samples were also measured by using temperature-modulated differential scanning calorimetry. The results do not point to a structural origin of the so-called intermediate phase, which in our work is indicated for the composition range 0.175(8) ≤ x ≤ 0.235(8) by a vanishingly small non-reversing enthalpy near the glass transition. The midpoint of this range coincides with the mean-field expectation of a floppy-to-rigid transition at x = 0.20. The composition dependence of the liquid viscosity, as taken from the literature, was also investigated to look for a dynamical origin of the intermediate phase, using the Mauro-YueEllison-Gupta-Allan (MYEGA) model to estimate the viscosity at the liquidus temperature. The evidence points to a maximum in the viscosity at the liquidus temperature, and a minimum in the fragility index, for the range 0.20 ≤ x ≤ 0.22. The utility of the intermediate phase as a predictor of the material properties in network glass-forming systems is discussed.

show abstract

“…Our T g 's determined from the inflexion point in the H vs. T scans are given in Table 1, with other reported values. [14][15][16] …”

Section: Introductionmentioning

confidence: 99%

Thermo-Kinetic Anomalies across Rigidity Threshold in Ge<SUB>x</SUB>Se<SUB>1-x</SUB>

Awasthi

Sampath

2002

Mater. Trans.

View full text Add to dashboard Cite

We have investigated the glass-transition kinetics of nine Ge x Se 1−x glasses by differential scanning calorimetry. Relation between the drive (heating-rate q) and response (heatflow shift ∆H at T g ) is seen to be strictly linear only for GeSe 4 , known to signify the bulk-rigidity threshold for this series. From an Arrhenius analysis the activation energies for glassy relaxation are estimated, and point to the existence of different thermokinetic phases below and above the threshold composition. Series behaviour of the kinetic activation is conciled to a concurring one seen in the size of cooperatively diffusing regions. The anomalies are attributed to structural crossovers with Ge doping; first from the parent uniform Se-chains to that of backbones out-branching at corner-shared Ge(Se 1/2 ) 4 tetrahedral clusters, and subsequently interconnecting by edge-shared configurations to realize a random pearl-necklace 3-D covalent network.

show abstract

Glass formation and properties of chalcogenide systems XXVI: Permittivity and the structure of glasses AsxSe1−x and GexSe1−x

Cited by 158 publications

References 42 publications

Structural development in Ge-rich Ge–S glasses

Structural development in Ge-rich Ge–S glasses

Topological Ordering and Viscosity in the Glass-Forming Ge–Se System: The Search for a Structural or Dynamical Signature of the Intermediate Phase

Thermo-Kinetic Anomalies across Rigidity Threshold in Ge<SUB>x</SUB>Se<SUB>1-x</SUB>

Contact Info

Product

Resources

About